Operating device for electric switches.



A. T. YTTERBERG.

OPERATING DEVICE FOR ELECTRIC SWITCHES.

APPLICATION rum) MAR. 30, 1909.

Patented Aug. 4, 1914.

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A. T. YTTERBERG.

OPERATING DEVICE FOR ELEGTRIG SWITCHES.

APPLICATION TILED MAR. so, 1909.

Patented Aug. 4, 1914.

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A. T. YTTERBERG.

OPERATING DEVICE FOR ELECTRIC SWITCHES.

APPLICATION FILED MAR. 30, 1909.

1,106, 126, Patented Aug. 4, 1914,

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A. T. YTTERBERG.

OPERATING DEVICE FOR ELECTRIC SWITCHES.

APPLICATION FILED MAR. 30, 1909.

1,106, 126. Patented Aug. 4, 19m

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APPLICATION IILED MAR. 30, 1909.

Patented Aug. 4, 1914.

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A. T. YTTERBBRG.

OPERATING 1mm r011 ELEGTRIG swmnns.

APPLICATION FILED MAR. 30, 1909.

1,106, 126. Patented mi, 1914 6 BHEETBSHEET 6.

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UNITED STATES PATENT or ncn.

ABLE TOR-BJaRN 'YTTERLBERG, OF WISBY, SWEDEN, ASSIGNOR TO WILLIAM Mi SCOTT, OF BERWYN, PENNSYLVANIA.

OPERATING DEVICE FOR ELECTRIC SWITCHES.

To all whom it may concern:

Be it known that I, ABLE ToRBJt'mN Y'rrnimnno, a subject of the King of Sweden, and resident of Wisby, in the Kingdom of Sweden, have invented certain new and useful Improvements in Operating Devices for Electric Switches, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to operating devices for electric switches of the class in which the switch, as for instance a great oil-switch, is actuated electro-mechanically by means controlled by a special control switch located in an associated control circuit. Devices of the said 'class hitherto known generally have been so arranged that the main switch has been closed and opened by means of a twoway control switch, brought into two different connecting positions, corresponding to the positions of the main switch. Such an arrangement, however, has the disadvantage of the movements of the control switch not corresponding with those of the main switch, owing to which facta false connection can The said disadvantage is removed according to this invention by combining the means by which the main switch is closed and opened respectively, with a oneway control switch in such manner that the control switch, when brought into its operating position, closes a circuit, which efi'ects the closing of the main switch, the opening means being at the same time brought into such a condition that they are caused to operate by the opening of the control switch. The opening of the main switch may be effected also automatically by means of time lag relays or the like, so connected that the action of the same corresponds to the opening of the control switch. The device is provided with two signal lamps indicating that the main switch is closed and opened respectively. The circuits of the said lamps are combined with a relay in such manner that an intermittent current passes -through one of the lamps, as the main switch is opened automatically, which lamp, consequently, emits a flickering light and thus eiiects an effective but, however, not irritating signal.

Several forms of the invention are shown in the accompanying drawings.

Specification of Letters Patent.

Application filed March 30, 1909.

Patent-ed Aug. 4., 1914. Serial No. 486,766.

Figures 1 and 2 show diagrammatically the operating device in opened and closed positions respectively. Fig. 3 shows the positions of the parts, as the opening of the main switch has been effected automatically. Figs. 4, 5, 6, 7, and 8 show different forms in which the signal devices are omitted. Figs. 9 and 10 are a front view and a side view respectively of the main switch as practically employed, the said figures also showing the opening and releasing means connected with the switch. I

1, Figs. 1 to 3 inclusive, is the main switch and 2 is the control switch. Vith the said main switch a motor or one (or more) electro-magnets 3 are combined, which, when a sufficiently strong current passes through the same, attracts its armature at, which results in the main switch being brought into operative position. At the same time a strong spring 5 is put under tension. switch is held in its closed position by a catch 6. The main switch is provided with an electromagnet 7, which, when a current passes through the same, attract-s its armature 8, which results in the catch 6 being disengaged, permitting the spring 5 to bring the main switch into its open position, as it is not then held by the magnet 3. The con-- trol switch 2, which is mounted on the switchboard and by means of which the main switch is operated, consists of an ordinary, single-pole, one-way knife switch, connected with one of the poles of a suitable source of current.

The magnet 3 and the control switch are connected in series,'and the magnet '7 and the said switch are connected in parallel. Owing to the said arrangement current will pass through the magnet 3 and the magnet T is rendered short-circuited and consequently dencrgized, when the control switch is brought into its closed position. As seen from the following description. current will pass through the said, magnet 7, only when the contra-l switch is open or the time lag relays come into o eration, the short-circuiting being in both cases interrupted.

A resistance 9 is connected in parallel with the magnet 3, in order that the breaking of the current through the said magnet may be facilitated. a

' In order to simplify the specification, it is The ma in presumed that the control switch is connected with the positive conductor, so that the direction of the current is from the control the conductors leading to the main switch.

The said relays are so constructed as to interrupt the said conductor to which they are connected, after a certain eriod, preferably inversely proportional to t e strength of the current, as the strength of the current passing through the main switch becomes too great. ()wing to the said fact that the shortcircuiting of the magnet 7 is interrupted the magnet is traversed by a current which passes to the negative pole through the re sistance 10. This will result in the opening of the main switch, as described I above @wing to the fact that the magnet 7 and the control switch are connected in parallel, the short-circuiting of the'former can be interrupted and thus the opening of the main switch be effected also by opening the control switch.

A. switch 17, fixed to the shaft 18, is connected with the same branch as the time lag relays but with the part of the branch located on the opposite side of the starting point of the conductor leading to the resistance 10. The said shaft is mechanically connected with the main switch in such manner, that, as the latter is closed or opened, the shaft is rocked in one direction or the other respectively in such manner, however, that the full rocking movement of the shaft takes place near the end of the movement of the main switch; Owing to the said arrangement, the switch 17 will be closed or. opened according as the main switch is closed or opened respectively, which will prevent the magnet 7' from being at any time provided with current for any longer period and thus from being heated.

A switch 19 is connected in series with the magnetB and located between the same and the control switch, which switch 19 is moved by the shaft 18. The said switch 19 is, however, not firmly fixed to the shaft 18 but connected to an arm, fixed to the same, by a spring 20,'in such manner that the switch 19 can be prevented from following the shaft, when rocked in such direction that it tends to close the switch 19, but is compelled to. follow the shaft, when it tends to open the switch. The connection between the switch 19 and the shaft 18 is so constructed that the shaft opens the switch 19, as the main switch is brought into its closed position, and tends to close'the switch 19, as the main switch is opened. In order to prevent the switch 19 from being closed in some cases a catch 21 is provided, which can catch the opened switch 19 and hold the same. The said catch is acted upon on one side by an electromagnet 22, connected in parallel with the switch 19, and on the other side by a spring 23, tending to move the same in the opposite direction. The switch 19 is held in its opened position by the catch 21, as long as the electromagnet 22 is energized, and is released by the catch only when the current through the electromagnet is interrupted and the spring 23" can move the catch laterally. vThe object of the switch 19 is to break the current through the magnet 3, as soon as the magnet has ef ected the closing of the main switch. in order that the said magnet may not prevent the openin or the main switch, as magnet 7 is energized. The object of the catching device of the switch 19 is to prevent the switch 19 and thus the main switch from being re-closed when the latter has been opened automatically. lln this case the control switch remains in its closed position, as will be seen from the following description, and if the switch 19 would then be closed, the magnet 3 would be energized and close the main switch.

In order to produce signals indicating the position of the main switch, etc. a green lamp 2-1 and a red lamp 25 are employed. The red lamp is connected in series with the electromagnet 22 and thus in parallel with the switch 19. Consequently, it acts at the same time as a series resistance to the magas the main switch is closed and vice versa.

Tn each of the lamp circuits a fuse 44, 45, respectively, is provided. The green lamp will under all circumstances emit light alone,

as long as the control switch is open, and the red lamp will act alone, as the main switch is closed. llf, on the other hand, the main switch has been automatically opened, both lamps will emit light. Consequently, fully distinct signals are provided, but one may desire possibly, that the automatic opening of the main switch be indicated by a signal to attract more attention. For that purpose a relay 27 is used, consisting of an electromagnet which is provided with two coils, I

one connected in series to the red lamp and the other connected with a contact piece 2Sv The said coils are so adapted that they wi l neutralize mutually their magnetizing effects, when traversed by current. In front of the el-ectromagnet an armature 29 is located, which is connected with the conductor leading from the green lamp. The armature, when attracted, is forced against the contact piece 28, so that the circuit of the.

green lamp will include one of the coils. As the attracting action of the magnet is interrupted, the armature is moved from the said contact piece to another contact piece 31, by the spring 30, so that the circuit is closed by a conductor leading from the contact piece last mentioned. As current only from the red lamp passes through the relay, its armature remains forced against the contact piece 28. If only the green lamp emits light, the armature bears against the contact piece 31 or the contact piece 28. Consequently, in both cases the lamp, which emits light, will have a steady light. If, on the other hand, the circuits of both the lamps are closed for a moment simultaneously, the armature is, for instance, first forced against the contact piece 28 by the magnet 27. The magnetizing effects of both the coils are thereby neutralized and the armature of the magnet,

is released. At the same time, however, the current of the red lamp alone becomes donii nating and the armature is again attracted. This is efi'ected whether the armature has reached the contact piece 31 or not. The armature will evidently repeat the said movement incessantly. Owing to the said fact an intermittent current will pass through the green lamp and the lamp will flicker. The lamp circuits are so arranged that both of them include the coil 3 and the resistance 9, in which, consequently, l varying reduction of voltage is eifected owing to the intermittent current through the green lamp, This will cause also the red lamp to flicker. It may be mentioned that the moment of inertia of the armature 29 is made so great that the interruptions are etfected with such great intervals as to permit the lamp to grow dark and be lighted sufiicientlys It may especially be pointed out that if the armature for some reason would remain at one of the contact pieces, the circuit of the green lamp is thereby not interrupted and that, consequently, a signal is effected, notwithstanding, indicating the automatic opening of the main switch, which signal consists in both the lamps being lighted. Consequently, the relay will in no re spect reduce the reliability of the signaling operation.

The means described effect a signal which highly attracts the attention of the attendants and which makes also an outsider fear that something not normal has happened. In contradistinction to signaling by means of bells, the signaling system described above ing the attendants and not disturbing the same, when communicating one with the other.

The coil of the magnet 3 is preferably so adapted that a current of comparatively great intensity, about 5 to 10 amperes, must pass through the same to cause the same to close the main switch. The resistance 9 connected in parallel to the magnet 3, is substantially as great as the resistance of the coil of the said magnet.

T he device operates in the following manner. The positions of the parts shown in Fig. 1 'may be considered as the starting positions; the main switch as well as the control switch are shown in their opened positions. The switch 19 is closed, 17 open and 26 closed. Consequently all conductors are without current with the exception of the circuit of the green lamp, which emits a quiet and clear light, because the armature of the magnet 27 remains bearing against the contact; piece 31. As the control switch is closed, a comparatively strong current passes through the magnet 3, which results in the main switch being closed or brought into the operating position. At the moment the closing takes place, the switches 19 and 26 are opened and the switch 17 is closed. The parts then occupy the positions shown in Fig. 2. The switch 26 having now been opened, the green lamp is extinguished. On the other hand. the red lamp has been lighted, owing to the fact that the control switch has been closed and the lamp is no longer short-circuited by the switch 19. The current passes from the red lamp through the magnet 22, which causes the catch 21 to engage the switch 19. The said current also passes through the relay 2? and the magnet 3. In the former it has no other effect than the forcing of the arma ture against the contact piece 28; in the latter it has no eifect at all, because it is very weak with relation to the current necessary for causing the magnet 3 to act. At the same time the switch 17 has been closed and the magnet 7 set in order to act. No current, however, passes through the same, as it is short-circuited by the control switch and the conductor leading through the time lag relays. A change in the positions of the parts can now be effected in two ways, either through the action of the time lag relays or through the opening of the control switch. The main switch is opened automatically when the current through one or more of the said time lag relays has become too strong, so that the relay or relays have broken the short-circuit around the magnet 7. At the same moment a current passes through the magnet T which results in the opening of the main switch. At the very moment when this is effected, the shaft 18 $5 has the significant advantage of not irritatl is rocked, so that the switch 26 is closed and the switch 17 is opened. Cwing to the closing of the switch 26, the green lamp is lighted. The opening of the switch 17 results in the breaking of the circuit through the magnet 7, so that the said magnet is energized for no longer period than the moment in which it is performing its function. The switch 19, if rigidly connected with the shaft 18, would also have been closed, but as now constructed it is prevented therefrom by the catch 21, which holds the same, owing to the fact that the control switch is closed and, consequently, the magnet 22 is energized. Consequently the main switch can not be re-closed. The red lamp is still lighted but the opening operation is signaled by the green lamp being also lighted. Consequently, the currents of both the lamps pass through the relay 27, and, as stated above, it comes into operation and causes the lamps to flicker. To bring the parts into the starting positions, it is suflicient to open the control switch. The red lamp is then extinguished and the green lamp ceases to flicker. At the same time magnet 22 becomes deenergized, so that the spring 23 can move the catch 21 laterally and the switch 19 is free and closes. All parts are now moved to their starting positions. If, on the other hand, the main switch is actuated by the opening of the control switch, the action will be the same as before, viz: The short-circuiting of the magnet 7 is interrupted, so that the magnet is energized and causes the opening of the main switch. Consequently, in this case the parts occupy their starting positions immediately on the opening of the control switch.

Fig. 4 shows an arrangement of the catch 21, more suitable in some cases. In the said figure the catch 21 is held in its acting position by the spring 23, while the magnet 22 actsmpon the catch only for a moment for the opening of the switch 19. As will be seen from the above description, the switch 19 is to be released only on the opening of the control switch. For that reason the magnet 22 is connepted in parallel with the control switch 2, in such manner however, that the magnet 22 remains short-circuited by the closed control switch, even. when thetime lag relays break the conductor to which they are connected, the apparatus being hesides so arranged that the magnet 22 will be connected in series with the resistance 10, as the control switch is opened. In order that the magnet 22 may not be energized also when the switch 19 has been released, a switch 32 is connected with the conductor provided exclusively for the magnet 22, which switch is firmly connected with the switch 19 in such manner that the latter is closed when the "former is opened, the switches being thus combined and forming a changing switch as shown in the drawings.

By the said arrangement greater security of service is gained owing to the fact that the catch 21 is kept in its operating position by a spring and it is not to be feared that the magnet 22 will be inadvertently traversed by a current and-release the switch 19. By suitably adapting the magnet 22, the advantage is gained that the switch 19, as the main switch is opened, never reteurns to its position of rest simultaneously with the shaft but always somewhat later, which is an advantage, as the spring 20 is thereby put under tension so that the switch is forced into the space between the contact pieces in a reliable manner. This is attained by so adjusting the magnet 22, that it will not operate until the operating force is about three-fourths of the whole tension of the magnet. The current, passing through the magnet 7, causes at first such a reduction of the tension in the resistance 10 during the opening operation, that the magnet 22 does not come into operation until the current through the magnet 7 is broken by the opening of the switch 17 which is cut out by the action of the main switch. Owing to the said fact the spring 20 is put under tension and, as the switch 19 is released at the same time, it is forcibly moved into the space between the contact pieces by the spring 20.

In the form of tlie Fig. 5, the magnet 7 is connected directly to the source of current used for the operation.

The switch 17, connected in the circuit of the magnet 7, is actuated by the shaft 18, partaking in the movements of the main switch, in the same manner as the switch 19, the switch 17 being for that reason connected. with the shaft 18 by a spring 33. The switch 17 is opened immediately after the opening of the main switch. As the main switch is closed, the switch 17 is held in its open position by the catch 34, held in its operating position by the magnet 35, provided in a circuit, leading from the positive pole, through the control switch 2 and the time lag relays 11, 12, 13, to the negative pole. ersed by a current at the same moment as the control switch is closed. The opening of the main switch is effected by the current being reduced or interrupted by the opening of the control switch or by the action of the time lag relays. The catch 34 is forced laterally by the spring 36 as soon as released from the magnet 35, the switch 17 being thereby released and forced into the space between the contact pieces by the spring 33 previously put under tension. Thus the magnet 7 is traversed by a current, the main switch is opened and the switch 17 is again moved from its operating position. Conseuently, the magnet 7 is energized only for a s ort moment. The catch 21' is arranged in i apparatus shown in Consequently, the magnet 35 is trav-' the same manner as shown in Fig. 4, i. e. the magnet 22 is connected in parallel with the control switch. Owing to the said fact the magnet is traversed by a current also after the opening of the control switch as it will. be then connected in series with the magnet 22. Consequently, the magnet 35 is to be carefully adjusted, so that it is able to attract the catch 34, as the magnet 22 is short-circuited, but releases the catch as the magnet "22 is cut in.

In the form of the apparatus shown in Fig. 6. the catch mechanism of the switch 19 is arranged as shown in Fig. 1 and the releasing mechanism as shown in Fig. 5. In the apparatus shown in Fig. 6, the careful adjusting of the magnet 35, necessary in the apparatus shown in Fig. is not necessary, as the currents passing through the same always have the same strength.

Fig. 7 shows an arrangement in which the magnet 7 is connected directly with the negative pole by a. conductor 40, which is connected substantially with the center of the coil of the magnet. During the normal action the current passes through both halves of the coil parallelly and in opposite directions, the magnetic action of the coil outward being thus neutralized. As the branch 42 is broken, the corresponding part of the coil is rendered currentless, which results in the other part acting magnetically and etfecting the opening of the main switch. The magnet, 22 is arranged as shown in Figs. 4 and 5 but may be connected also in the same manner as shown in Fig. 6. The branches of the magnet 7 are each provided with a switch 37, 38, respectively. The said switches and the switch 19 are firmly connected with a rocking shaft 39. which is connected with the shaft 18, operated by the main switch, by yielding means corresponding. for instance. to the connection between the shaft 18 and the switch 19. Fig. i.

Fig. 8, finally, shows an arrangement in which the magnet 7 is connected in series with the control switch 2 and in parallel with the switch 19 and the magnet 3, so that the magnet 7 is deenergized by the opening of the control switch. In order to attain the result aimed at by such arrangement, the armature 8 is connected at its lower end with a spring -11. which, as the magnet 7 is denergizedby the opening of the control switch, forces the armature 8 upward against the catch 6. so that the main switch is released and opened. As the magnet 7 is energized, the armature 8 is retracted into the coil against the action of the spring 41, so that the catch 6 can hold the main switch in its closed position. The time lag relays 11, 12, 13 are provided in the branch of the magnet 7. The switches 19 and 32 are arranged in the same manner as shown in Figs. 4 and 5. In this apparatus the resistance 10 as well as the switch 17 is dispensed with. The arrangement has the advantage of the main switch being opened, it the operating current should, for some reason, fail.

The arrangement described above may evidently be modified in many respects without departing from the essential features of the invention. As for instance, the opening device may be arranged and connected in any other manner which fulfils-the condition that the opening device is caused to act by the opening of the control switch. If no means for automatic opening are employed, the catching device for the switch 19 as well as the relay 27 are superfluous and may be dispensed with. If a signal consisting of both the lamps being lighted, as the main switch has been opened automatically, is considered sufficient, the relay 27 may evidently be dispensed with. The switches 17 and 26, finally, may be combined to a singlepole double throw switch provided with four contacts.

What I claim is:

1. The combination with a main switch, of electro-magnetic means for moving the same to normal position, means for restraining said main switch in normal position, an electro-magnet adapted to actuate said restraining means, a control switch having but one "closing position, and circuit connections whereby said control switch is connected in series with said electro-magnetic means and in parallel with said electro-magnet.

In combination, a main switch, electric means for closing it, holding means for maintaining the main switch in closed position, electrical disengaging means adapted to operate the said holding means, a.- control switch having but one closing position and interposed in the circuitof the main switch closing means and a circuit including the said disengaging means, the said disengaging means being connected in parallel with the control switch.

3. The combination with a main switch, of electromagnetic means for moving the same to normal position, means for restraining said main switch in normal position, an electro-magnet adapted to actuate said restraining means, a control switch having but one closing position, circuit connections whereby said control switch is connected in series with said electro-magnetic means and in parallel with said electro-magnet, and a switch operated in definite relation with said main switch controlling the circuit of said electro-magnetlc means.

4. The combination with a main switch, of electro-magnetic means for moving the same to normal position, means for restraining said main switch in normal position, an electro-magnet adapted to actuate said restraining means, a control switch having but one closing position, circuit connections whereby said control switch is connected in series with said electro-magnetic means and in parallel with said electro-magnet, and and means responsive to electrical conditions in the circuit of said main switch controlling the circuit of said electro-magnet.

5. The combination with a main switch, of electro-magnetic means for moving the same to normal position, means for restraining said main switch in normal position, an electromagnet adapted to actuate said restraining means, a control switch having but one closing position, circuit connections whereby said control switch is connected in series with said electromagnetic vmeans and in parallel with said electro-magnet, a switch operated in definite relation with said mam switch controlling the circuit of said electromagnetic means, and means locking said last named switch in open position.

6. Ihe combination with a main switch, of electromagnetic means for moving the same to normal position, means for restraining said main switch in normal position, an electro-magnet adapted to actuate said restraining means, a control switch having but one closing position, circuit connections whereby said control switch is connected in series with said electromagnetic means and in parallel with said electro magnet, an automatically operated switch controlling the circuit of said electro-magnetic means, means locking said last named switch in open position, and an 'electro-magnet controlled by said control switch for unlocking said automatically operated switch.

7. In combination, a main switch, electric means for closing it, holding means for maintaining the main switch in closed position, electrical disengaging means adapted to operate the said holding means, a control switch having but one closing position and interposed in the circuit of the main switch closing means, a circuit including the disengaging means and controlled by the control switch, two signal lamps, one interposed in a circuit which includes the control switch and the other in a circuit which includes a switch mechanically connected with the main switch and arranged to be opened by closing the latter, and an electromagnet combined with the circuits which include the lamps and arranged to break and make alternately the circuit of one of the lamps when the control switch and the switch connected with the main switch are simultaneously in closed positions.

8. In combination, a main switch or circuit breaker, a motive coil for moving the same to normal position, a motive coil switch for breaking the circuit of said motive coil when said main switch or circuit breaker reaches normal: position, and means for locking said motive coil switch in-open position.

9. In combination, a main switch or circuit breaker, a motive coil for moving the same to normal position, a motive coil switch for breaking the circuit of said motive coil when said main switch or circuit breaker reaches normal position, means for locking said motive coil switch in open position, and a coil for unlocking said motive coil switch.

10. In combination, a main switch or circuit breaker, a motive coil for moving the same to normal position, a motive coil switch, means for opening said motive coil switch to deenergize said motive coil when said main switch or circuit breaker reaches normal position, means for locking said motive coil switch in open position, a coil for unlocking said motive coil switch, and a switch for opening the circuit of said coil when said motive coil switch is closed.

11. In combination, a main switch or circuit breaker, a motive coil for moving the same to normal position, amotive coil switch, means operative in one direction only to move the same to open position when said main switch or circuit breaker reaches normal position, and. means for locking said motive coil switch in open position.

12. In combination, a main switch or circuit breaker, a motive coil for moving the same to normal position, amotive coil switch, means operative in one direction only to move the same to open position when said .main switch or circuit breaker reaches normal position, and means for holding said motive coil switch open when said main switch or circuit breaker opens.

13. In combination, a main switch or circuit breaker, a motive coil for moving the same to normal position, amotive coil switch, means operative in one direction only to move the-same'to open position when said main switch or circuit breaker reaches normal position, means for locking said motive coil switch in open position, and a coil for unlocking said motive coil switch.

14. In combination, a main switch or circuit breaker, a controlling coil therefor, a switch controlling said coil, and means independent of said main switch for locking'said switch in closed position, said coil adapted to unlock its controlling switch.

15. In combination, a main switch or circuit breaker, a controlling coil therefor, a switch controlling said coil, and means operative in one direction only for closing said switch when said main switch or circuit breaker is moved to normal position.

16. The combination with a circuitbreaker and its tripping mechanism, of a motive coil therefor, a control coil, a motive coil switch held open when said circuit breaker is open, and means controlled by said control coil for closing said motive coil switch, whereby to close the circuit breaker the control coil must be energized before the motive coil can be energized.

' 17 The combination with acircuit breaker and its tripping mechanism, of a motive coil therefor, a control coil, motive coil and control coil switches held open and closed respectively when said circuit breaker is open, said control coil adapted to cause the closure of the motive coil switch and the opening of the control coil switch, whereby to close the circuit breaker the control coil must be energized before the motive coil can be energized.

18. The combination with a circuit breaker and its tripping mechanism, of a motive coil therefor, a control coil, a motive coil switch and a control coil switch, said motive coil switch held open and said control coil switch held closed after said circuit breaker is for holding the motive coil switch open when said circuit breaker is tripped by its own tripping mechanism, and a coil adapted to release said motive coil switch to reestablish the circuit of said motive coil. I

20. The combination with a switch, of a motive coil for moving said switch to normal position, a trip coil for said switch, said motive coil actuating said switch in one direction only, and means necessitating the, energization of said trip coil before saidmotive coil can be energized.

21. In combination, a-main switch or circuit breaker, a motive coil for moving the same to normal position, a motive coil switch for breaking the circuit of said motive coil when said main switch or circuit breaker reaches normal position, means for locking said motive coil switch in open position, and an operators switch for controlling said motive coil.

22. In combination, a main switch or circuit breaker, a motive coil for moving the same to normal position, a motive coil switch for breaking the circuit of said motive coil when said main switch or circuit breaker reaches normal position, means for locking said motive coil switch in open position, a coil for unlocking said motive coil switch, and an operators switch controlling said coils.

23. In combination, a main switch or cir cuit breaker, a motive coil for moving the same to normal position, a motive coil switch, means for opening said motive coil switch to deenergize said motive coil when said main switch or circuit breaker reaches normal position, means for lockingsaid motive coil switch in open position, a coil for 11n locking said motive coil switch, a switch for opening the circuit of said coil when said motive coil switch is closed, and an operators switch controlling said coils.

24:. In combination, a main switch or circuit breaker, a motive coil for moving the same to normal position, a motive coil switch, means operative in one direction only to move the same to open position when said main switch or circuit breaker reaches normal position, means for locking said motive coil switch in open position, and an opera tors switch controlling said motive coil.

.25. In combination, a main switch or circuit breaker, a motive coil for moving the same to normal position, a motive coil switch, means operative in one direction only to move the same to open position when said main switch or circuit breaker reaches normal position, means for holding said motive coil switch open when said main switch or circuit breaker opens, and an operators switch controlling said motive coil.

26. In combination, a main switch .or circuit breaker, a motive coil for moving the same to normal position, a motive coil switch, means operative in one direction only to move the same to open position when said main switch or circuit breaker reaches normal position, means for locking said motive co-il switch in open position, a coil for unlocking said motive coil switch, and an cpci'atcrs switch controlling said coils.

In combination, a main switch or circuit breaker, a controlling coil therefor, a switch controlling said coil, means for looking said switch in closed position, said coil adapted to unlock its controlling switch, and an operators switch controlling the circuit cf said controlling coil and its switch.

28. The combination with a circuit breaker and its tripping mechanism, of a motive coil therefor, a control coil, a motive coil switch held open when said circuit breaker is open, means controlled by said control coil for closing said motive coil switch, whereby to close the circuit breaker the control coil must be energized before the motive coil can be energized, and an operators switch for controlling said motive coil and said control coil.

29. The combination with a circuit breaker and its tripping mechanism, of a motive coil therefor, a control coil, motive coil and control coil switches held open and closed respectively when saidcircuit breaker is open said control coil adapted to cause the closure of the motive coil switch and the opening of the control coil switch, whereby to close the circuit breaker the control coil must be energized before the motive coil can be energized, and an operators switch for controllining said motive coil and said control coil.

30. The combination with a main switch or circuit breaker, of a motive coil for actutit) ating the same, a latch for restraining said main switch or circuit breaker, a trip coil for actuating said latch, and an operators switch having but one closing position controlling said motive and trip coils, and connections whereby one of said coils may be energized only when said operators switch is open and the other may be energized only when said operators switch is closed.

31. The combination with a main switch, of electromagnetic means for moving the same to normal position, means for restraining said main switch in normal position, an electro-magnet adapted to actuate said restraining means, a control switch having but. one closing position, circuit connections whereby said control switch is connected in series with said electromagnetic means and in parallel with said electro-magnet, and a switch operated in definite relation with said main switch controlling the circuit of said electro-magnet.

32 The combination with a main switch, of electromagnetic means for moving the same to normal position, means for restraining said main switch in normal position, an electro-magnet adapted to actuate said restraining means, a control switch having but one closing position, circuit connections whereby said control switch is connected in series with said electro-magnetic means and in parallel with said electro-magnet, an automatically operated switch controlling the circuit of said electro-magnet, means for locking said automatically operated switch, and means controlled by said control switch controlling said locking means.

33. The combination with a main switch,

of electro-magnetic means for moving the same to normal position, means for restraining said main switch .in normal position, an electro-magnet adapted to actuate said restraining means, a control switch having but one closing position, circuit connections whereby said control switch is connected in series with said electro-magnetic means and in parallel with said electro-magnet, a switch operated in definite relation with said main switch controlling the circuit of said electro-magnetic means, means locking said last named switch in open position, an electro-magnet controlled by said control switch for unlocking said last named switch, and a switch operated in definite relation with said main switch controlling the circuit of said last named electro-magret.

34:. The combination with a main switch, of electromagnetic means for moving the same 'to normal position, means for restraining said main switch in normal position, an electro-magnet adaptedto actuate said restraining means, a control switch having but one closing position, circuit connections whereby said control switch is connected in series with said electroma an automatically operated switch controlling the circuit of said first named electromagnet, means for locking said last-named switch, and an electro-magnet controlling said locking means;

35. In combination, a main switch, a mo-' tive coil for moving the same to normal position, means for restraining said main switch, a coil for tripping said main switch, a motive coil switch for breaking the circuit of said motive coil when said main switch reaches normal position, means for locking said motive coil switch in open position, a coil for unlocking said motive coil switch, an operators switch having but one closing position, and connections whereby said operators switch controls said coils.

36. Tn combination, a main switch, a motive coil for moving the same to normal position, means for restraining said main switch, a coil for tripping said main switch, a motive coil switch for breaking the circuit oft said motive coil when said main switch reaches normal position, means for locking said motive coil switch in open position, a'coil for unlocking saidmotive coil switch, an operators switch having but one closing position, and connections whereby in one position of said operators switch it permits energization of one of said coils and prevents energization of another of said coils.

37. The combinationwith a switch and its restraining means, of a motive coil for moving said switch to normal position, a trip coil for said switch, a control switch having but one closing position, and circuit connections whereby said control switch controls said motive coil when in one position and said trip coil when in the other position.

38. The combination with a switch and its restraining means, or a motive coil tor moving said switch to normal position, a

tripcoil for said switch, a control switch' having but one closing position, and circuit connections between said coils and said control switch, whereby for one position oit said control switch said main switch is moved to normal position and in the other position said main switch is tripped.

39. The combination with a switch and its restraining means, of a trip coil therefor, a motive coil therefor,'a control switch having but one closed position controlling said trip and motive coils, and means responsive tothe electrical conditions in the circuit of sallpl first named switch controlling said trip c0 In witness whereof, I have hereunto signed my name in the presence of two suh- 10 scribing witnesses.

ARLE TORBJtlRN YTTERBERG.

\Vitnesses:

SVEN S. PHILIP, RnDoLr LINSE. 

